Crystal structure, spectra, and thermal behavior of lanthanide complexes with 2-chloro-4-fluorobenzoic acid and 5,5′-dimethyl-2,2′-bipyridine

Two binuclear complexes [Pr(2-Cl-4-FBA)3(5,5 '-DM-2,2 '-bipy)](2) (1) and [Dy(2-Cl-4-FBA)(3)(5,5 '-DM-2,2 '-bipy)](2)center dot 2(2-Cl-4-FHBA) (2), where 2-Cl-4-FHBA=2-chloro-4-fluorobenzoic acid and 5,5 '-DM-2,2 '-bipy=5,5 '-dimethyl-2,2 '-bipyridine, have been fabricated and characterized. The two complexes crystallize in the P (1) over bar space group of the triclinic crystal system, featuring 1D and 2D supramolecular structures. The structure of complex 2 is fascinating, containing two free 2-Cl-4-FHBA molecules, which are rare in lanthanide complexes. A three-dimensional infrared stacking diagram of the gas phase products indicates that the main gaseous products released over the whole decomposition process are water, carbon dioxide, some gaseous molecules, and the gaseous organic fragments. Also, the fluorescence property of complex 2 has been studied. CCDC: 2051811, 1; 2051810, 2.